Wind tunnel



FIG. 1 is a front perspective view of a first embodiment of a wind tunnel showing our new design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a third side view thereof;

FIG. 5 is a fourth side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front perspective view of a second embodiment of a wind tunnel showing our new design, with the other views being analogous to FIGS. 2-7 of the first embodiment.

The broken lines shown in FIG. 8 represent unclaimed seam lines and form no part of the claimed design. 

CLAIM The ornamental design for a wind tunnel, as shown and described. 